Raizel, protector of the nobles, along with his loyal butler Frankenstein and former Union experiment M-21, continue to spend their days at Ye Ran High School while keeping their true identities secret. They were living their lives as normal until one day, when a violent gang barges onto the school grounds. M-21 is forced to make a choice in order to protect the students. Meanwhile, DA-5, a mysterious special forces team, is dispatched to Japan on an investigative mission. What will become of the trio's peaceful new life?
You know I can't afford 
to start any trouble right now!
تعلم أنّني لا أستطيع افتعال 
!أيّ مشاكل في الوقت الرّاهن
Du weißt, dass ich mich gerade
aus Ärger raushalten sollte!
Sabes que no puedo meterme en problemas.
Sabes que no puedo
meterme en problemas.
Je ne peux pas provoquer une scène !
Non posso certo permettermi di creare scompiglio...
Мне нельзя привлекать внимание!